Fixed MANTIS-4341 (Allow setting node types to NOT include on menu)

  - [tt]include[/tt] -- either [tt]children[/tt] or [tt]wrapper[/tt] ([i]this only applies to calls directly made to the menu block[/i]). [tt]children[/tt] says to include the children of the page-link, while [tt]wrapper[/tt] says to include the whole branch including the wrapper node.

  - [tt]max_recurse_depth[/tt] -- if set, this is a number specifying how deep the menu should go

  - [tt]use_page_groupings[/tt] -- if set to 1, page-groupings (i.e. the hard-coded page organisation, separate to zone structure) will be used

  - [tt]valid_node_types[/tt] -- a "|" separated list of Sitemap node-types to include (advanced)

  - [tt]valid_node_types[/tt] -- a "|" separated list of Sitemap node-types to include (advanced); you can put a minus in front for it to be inverted into a list of invalid node-types

  - [tt]child_cutoff[/tt] -- the maximum number of children a node may have (if this limit is exceeded [i]no[/i] children will be shown for that node)

  - [tt]consider_secondary_categories[/tt] -- if set to 1, secondary categorisations will be considered, meaning nodes may be duplicated

  - [tt]consider_validation[/tt] -- if set to 1, non-validated resources will not be shown

                    $setting = $bit_parts[1];

                    switch ($bit_parts[0]) {

                        case 'valid_node_types':

                            if (substr($setting, 0, 1) == '-') {

                                $valid_node_types = array_diff(array_keys(find_all_hooks('systems', 'sitemap')), explode('|', substr($setting, 1)));

                            } else {

                                $valid_node_types = explode('|', $setting);

                            }

                            break;

                        case 'child_cutoff':